Rotary printing-press



P. MARTIN.

ROTARY PRINTING PRESS.

APPLICATION FILED MAY3|| 1913.

1,386,573, Patented Aug. 2, 1921.

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MARTIN. ROTARY PRINTING PRESS.

APPLICATION FILED MAY 31, I913- Patented Aug. 2, 1921.

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P. MARTIN.

ROTARY PRINTING PRESS. APPLICATION FILED MAY 31, 1913.

1,386,573. Patented Aug. 2, 1921.

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ROTARY PRINTING PRESS- I APPLICATION FILED MAY3|| 1913- 9386,5j730 Allg- 2,

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I v 04 v PATENT OFFICE.

PAUL MARTIN, OF ROUBAIX, FRANCE.

ROTARY PRINTING-PRESS.

Application filed May 31, 1913.

Specification of Letters Patent.

Patented Aug. 2, 1921.

Serial No. 771,036.

(GRANTED UNDER THE PROVISIONS OF THE ACT OF MARGIT 3, 1921, 41 STAT. I, 1313.)

To all whom it may concern.

Be it known that 1, PAUL MARTIN, a citizen of the French Republic, residing at N o. 50 Rue de la Redoute, Roubaix, France, have invented certain new and useful Improvements in Rotary Printing- Presses, (for which I. have filed applications in France, June 5,1912, Patent No. 444,745, and in England, Aug. 16, 1912, Patent No. 18,826,) of which the following is a specification.

This invention relates to rotary web printing machines of the type in which after printing, the paper is cut off into sheets of a size adjustable to agree with the amount of stereo on the printing cylinder.

The object of this invention is to increase the efliciency and the accuracy of operation of such machines, insuring a correct register when the press is printing on both sides of the paper, or when the same sheet is printed in different colors on one and the same press.

This object is effected by a simple and precise combination of devices comprising two cylinders, a cuttingcylinder and a delivery cylinder, suitably operated, together with a suitable number of tightening rollers, capable of adjustment according to the size of the sheet, and also two rollers provided near the cutting and delivery cylinders which are required for feeding the paper to the exact length of the sheet and with exact register, and adjustment. Arrangements are also made whereby the web is unwound from the reel intermittently to correspond to the required feed.

One form of this invention is illustrated in the accompanying drawings, in which Figure l is a diagrammatic side view of the principal parts of the improved press showing the path of the paper web.

Figs. 2 and 3 are respectively a side and end elevation of the mechanism for start ing and stopping instantaneously the supplementary paper feeding cylinders.

Fig. 4 illustrates a spring employed as a brake.

- Figs. 5 and 6 illustratethe cams for operating the brakes at the desired times.

Figs. 7 and 8 illustrate the construction of the delivery cylinder.

Figs. 9, 10, 11, 12, 13 and 14. illustrate the operation of the cutting cylinder;

'Fig. 15 illustrates the means for driving the paper reel. I r 7 As shown, the rotary press comprises two cylinders 1 and 1' on which the printing blocks or stereos are fixed. The latter are in contact with the blanket cylinders and the corresponding impression cylinders 2 and 2. 3 and 4 are two drums constituting the cutting and deliver 7 devices for the printed sheets. The drum 3 carries a saw tooth or knife edged blade; the drum 4 which is provided like the cutter with two cheeks for feeding the paper, has two diametrically opposed grooves and is provided with the necessary delivery blades for delivering the cut sheets.

5 and 6 are intermittently rotating rollers arranged in advance of the cutting and de livery drums. 7 is a first tightening roller for tightening the paper web in such a manner that the distance Z2 0 between the cylinders 1 and 2, 3 and 4 in passing between 5 and 6 shall be double the length of the sheet to be printed. A suitable number of tightening rollers 8, 9 and 10 are provided for tightening the paper so as to produce a stretch a 6 equal to the stretch b c.

The cutting cylinder 3 (Figs. 1 and 9 to 14) consists of a series of plates A mounted on'an axle B. These plates have a notch or recess C formed along a portion of their circumference. These plates are arranged in pairs so as to allow of regulating the size of the cut away sector (Z by turning the plates A. A saw blade D serves as a cutter for cutting the paper and is fixed on the two plates mounted on the ends of the axle B.

The delivery cylinder 4, (Figs. 1, 7 and 8) consists of two cheeks E and E fixed on the shaft F. This shaft carries a long sleeve G on which is mounted a plate H and two rings I and I. The cheeks E and E, the plate H and the rings I and I are formed with two grooves e 6 arranged diametrically opposite each other into which the knife of the cutter is adapted to enter for cutting the web. A certain number of sleeves J each fixed with two wings K and K which carry the impaling pins 9 and g for engaging the cut end of the web, are arranged so as to be capable of moving around the axle F by turning on G. Grooves such as h and h are formed in-the cheeks E and E, the plate H, and the rings I and I for the purpose of enabling the sleeves J to be displaced. The wings K and K are connected by two axles L and L upon which are keyed the pin-- ions 2' z" gearing with the toothed sectors 9' and j fixed to the delivery blades 72 7c. The purpose and operation of. this arrange ment of delivery cylinder was described in .the specificationof my prior Patent, No.

104:2938, dated Oct. 29, 1912.

Rollers 5 and 6 are provided for feeding the paper at the proper time and during the.

desired period. The two rollers 5 and 6 are provided with a device for effectingthe instantaneous starting and stopping ofthe feed. The rotary motion is controlled byi 'two brakes which are operated as follows 1- The axle B of the cutting cylinder is provided at one end with a plate M upon which is fixed a suitable cam m, and at its other end with a toothed wheel N. The axle 5 of the roller 5 carries, in addition to the toothed 20 wheel 0, a dish-shaped member P, in which is arranged a brake consisting of a simple leaf spring a 4) adapted to be moved apart by the rotation of the stud 0 formed with two flat surfaces situated between the ends 19 and p. This rotation is imparted by means of a lever Q which acts at the proper times to produce an absolute stoppage of the roller 5.

Two toothed wheels R and R arranged side by side are mounted so as to revolve freely on a pin S carried by the frame of the machine. lhe wheel R gears with the wheel N and the wheel R gears with the wheel 0. The wheels R, R are formed with an angular recess in which is arranged a clutch a (similar to the brake n shown in Fig. 4)

- which acts to connect the wheels R and R,

The tightening devices consists of rollers- 7 8 & 9 (Fig. 1) which are suitably placed and constructed so as to be capable of slidingfor the purpose of varying the lengths of the stretches of paper while maintaining strictly the same proportions between the fixed points a b and b c.

The operation of the improved press is as follows The paper following the path indicated by the arrows in Fig. 1, passes first between the cylinders 1 and 2 whereby it is printed on one side and then over the tightening rollers 8, 9 and 10 and between the cylinders 1 and 2, whereby it is printed on its other side.

The perfected web then passes to the cutting anddelivery devices 3 and 4 by passing on its way between the feeding cylinders 5' and 6 and if necessary over'the tightening roller 7. r

The press is regulated in such a manner as to insure that the knife of the cylinder 3 shall operate at the moment when, the gap between the ends of the stereo on the roller 1 is situated on the line connecting the centers of the cylinders 1 and 2. The same applies to the cylinder 1'.

The impression cylinders 1 and 2, 1, 2 have the same diameter as the cutting cylinder 3 ,their peripheral speed is the same as that of cylinders 5 and 6 which feed the impression cylinders 1 and '2, 1 and 2 and secondly with the cutting and delivery drums 3 and 4c, the length of the cut sheet delivered by the operation of the delivery blades and Z, 7c and Z will be equal to the perimeter of the cylinder which carries the printing block or stereo or of the cutting cylinder. This will be the maximum length which can be delivered by the machine.

If it is desired, for instance, to work upon sheets of shorter length, it will then be sufficient to furnish the stereo cylinder over only a portion of its circumference to an extent corresponding to the length of the paper which is to be used. In such a case since the pressure between the printing and the impression cylinders is no longercontinnous, the feedof the paper is, according to my invention, interrupted at the part where there is no stereo. V I

Since the cutting and delivery drums are adapted to feed the paper, it is sufficient to arrange that these drums be out of contact during a period'equal to the period during which thepaper is no longer fed by the impression cylinders. This can be readily done by means of the construction of the cutting cylinder. It issufiicient to turn the plates Ain such a manner that the length of the arc ofthe circle which is interrupted or of the cut away sector formed by each group of juxtaposed plates shall be equal to that portion of the circumference of the stereo cylinder which is not furnished with stereos.

Since the impaling pins 9, g are adjusted to correspond to this interrupted arc of a circle by -means; of the movable sleeves J with wings K- and K as hereinbefore described, the cutting and the delivery of the printedsheets will be consequently effected at the desired length corresponding to the length of the circumference of the stereo cylinder which is covered by the stereo or stereos. V

bince the paper is fed intermittently although the press rotates continuously, the sheets will be of less length than'the perimeter of the cutting cylinder. The tightening rollers will now have positions at 7, 8, 9' and 10, such that the lengths of the paper a b and Z) 0 will be equal to twice the developed circumference of the cutting cylinder 3 less twice the length of the arc of the sector d.

In practical working it is obvious that these elements willnot be sufiicient to provide for the speed of the rotary parts in working, the speed acquired by the paper causing irregularities. Consequently, inorder to insure the proper feeding of thepaper with a consequent regularity in the length of the sheets and exactness of register, use is made of the rollers 5 and 6 arranged in front of the cutting and delivery drums 8 and 4:. These cylinders revolve in an intermittent manner for feeding the paper during the necessary period. They cease to revolve at the moment of cutting the paper. The starting and stopping of these cylinders are controlled by the brake n and clutch n hereinbefore described, the operation of which is controlled by the cams t and m.

The two wheels R and R which are loose on the axle S engage the one with the wheel N and the other with the wheel 0. lVhen the rollers rolls over If, the clutch n comes into operation and the wheel 0 r0- tates; the rollers 5 and 6 are then in motion and the paper is fed. When the cam m meets the roller u, the roller 8 is situated in the recess in 25 and a does not operate, but n operates through the medium of the levers U and Q so as to fix the wheel 0 and leave the cylinders 5 and 6 stationary, thus preventing the paper from being pulled. The cams t and m (Figs. 5 and 6) are shaped to produce as the result of their operation a determined interruption of the feed so that it will be necessary to change the cams for each different size of sheet, and to replace them by others which will correspond to the aperture of the sectors of the cutting drum.

The machine can also be utilized for sheets of various widths, the drums 3 and 4 being adjusted for this purpose. As regards the drum 4 (Fig. 7) it will be sufficient to shift the plate H nearer to E, to slightly alter the distance between the rings I and I and to arrange conveniently the sleeves J. As regards the drum 3 (Fig. 9) the end plates A and A are left in their initial positions and the sector plates comprised between the plates A and the plates A are shifted so that the last sector plate corresponds to the plate H of the drum 4: and consequently the impaling pin situated at that end and the middle plates with the middle impaling pin of the drum 4:.

It is obvious that the improved press in order to work perfectly will require a device which will allow of unwinding the reel of paper as required. It will therefore be necessary to provide mechanism for driving the paper reel controlled so as to deliver the paper web intermittently to agree exac-tl with the different lengths of the sheets whic 1 are to be cut on the machine. In this man ner shocks and consequent breaking of the paper occurring at the restarting of the pulling of the press will be prevented. Among the numerous devices which might be adopted, I prefer to use the hereinafter described type which comprises on the one hand a cylinder for driving the paper reel, viz., a cylinder composed like the cutting cylinder, of a series of plates having a notch or recess formed along a portion of their circumference, and on the other hand a catch for locking the reel during the passage of the recess provided ineach group of the juxtaposed plates, constituting this cylinder.

The paper coming from the reel IV is fed onward by the two cylinders Y and Z being pressed between these cylinders, the cylinder Z being driven by a suitable friction meclnn nism.

The paper fed by the cylinders Y and 15 must be' always greater in quantity than the quantity consumed by the press, and therefore it is necessary to provide a suit able mechanism for this purpose and also for insuring that this excess quantity shall never be too great.

On the axle of the cylinder Z there is fixed a ratchet wheel 20 and below this ratchet wheel there is provided a lever 21 having a tooth 22, pivoted at 23, and connected at 2 1 to a connecting rod 25 bearing a roller 26. A lever 27 pivoted at 28 is fixed to a cam 29 and carries at one end a roller 30 and at its other end a counter-weight 31.

As the paper passes over the cylinder as indicated by the arrow, the cylinder 30 will impart constantly to the paper the necessary tension for preventing it from flapping. When the cylinder 30 is in the position 30 the cam 29 will have the position 29; the connecting rod 25 will have lifted the lever 21 and thus caused the tooth 22 to engage the ratchet wheel and thus stop the feed cylinder Z. Since the paper is being pulled continually it will move the lever 27 in the opposite direction so as to disengage the tooth 22 from the ratchet wheel 20 and thus allow the cylinder Z to rotate. This compensating mechanism will prevent such a large excess of paper being fed as would inconvenience the proper working of the machine.

Having now described my invention what I claim as new and desire to secure by Letters Patent is 1. In a rotary or other printing press for printing webs comprising printing and impression cylinders, the combination of cutting and delivery drums, means of regulation capable of varying the .duration of contact of said cutting and delivery drums, two

supplementary cylinders rotating intermittently for feeding the paper during the period of time corresponding to they time of impression of the impression cylinders and the pressure periods of said cutting and delivery drums a brake and a clutch forregulating the starting and stopping of said supplementary cylinders in a precise manner.

2. In a rotary or other printing press comprising printmg and impression cylinders the combination of cutting and delivery drums, means of regulation capable oi": varying the duration of contact ofsaidcutting by the adjustment of which the length of paper comprised between the point of contact of the printing and impression cylinders W for printing. on one side of the paper andv the point of contact of the printing and impression cylinders for printing on theother side of the paper and the length comprised between said latter impression cylinders and said cutting and delivery cylinders are made equal to each other and to doublethe length of the sheets.

3. In a rotary-or other printing press comprising printing and impression cylinders and apaper reel, the combination of cutting and delivery drums, means of regu- Ylation capable of varying the duration of contact of saidcutting and delivery drums, two supplementary cylinders rotating intermittently in such a .manner as tofeed the paper during the period of time corresponding to the time of impression of the impression cylinders and the pressure periods of the cutting and delivery cylinders/, and a group of tightening 'rollers by. the adjust ment of which the length of paper comprised between the point of contact. 01": the printing and impression cylinders for printing on one side of thepaper and the point of contact of the printing, and impression cylinders for printingon the other side of the paper and the length comprised between said latter impression cylinders and said cutting and delivery cylinders are. made equal to each other and to double the length of the sheets, means for feeding *a length of web from the paper reel'in excess of the length actually required for the impression, andmeans for insuring that said excess length shall not exceed a determined-amount. In testimony whereof I afiix my signature in presence of two witnesses.

P AUL MARTIN. Witnesses: V

I Aorr LLnLErERT, v 3HENRI DOROHIES. 

